fossil salt

• 岩盐

fossil salt的用法和样例：

例句

1. Quartztes and rock salt have the highest conductivities.
   石英岩和岩盐的热导率最高。
2. It is said that some of the world's supply of salt is mined as rock salt.
   据说，世界上有些食盐的供应靠采掘岩盐。